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wa15
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Very Slow NBD on 10Gb Network

Post by wa15 » Mar 11, 2019 9:25 pm

Physical Veeam server holding all roles (repo/proxy/B&R) with 10Gb network access. Running v9.5 U4 and 24 hours.
Source storage is a Nimble. Both storage and computer are on 10Gb. Running vSphere 6.5

With NBD, I only see an average of about 25MB/sec read times on the VMDKs. Highs of 40MB/sec and lows of 10MB/sec. Bottleneck is always showing "source ~95%".

I realize NBD is slower than hot add or direct storage access due to data traveling over vSphere management stack, but should I not be expecting faster speeds on a 10Gb network?

Thanks in advance!

Gostev
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Re: Very Slow NBD on 10Gb Network

Post by Gostev » Mar 11, 2019 9:38 pm

Yeah, you should normally expect 10x better performance NBD on 10Gb Ethernet... check your network hardware or its settings, as your bottleneck statistics is pretty telling. Thanks!

wa15
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Re: Very Slow NBD on 10Gb Network

Post by wa15 » Mar 11, 2019 9:58 pm

Thanks, will do. May reach out to support for this as well.

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